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Posted to uk.d-i-y
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That's the CH fixed then
In article ,
writes:
On Thursday, 24 November 2016 21:47:10 UTC, Andrew Gabriel wrote:
In article ,
tabbypurr writes:
On Monday, 21 November 2016 10:10:43 UTC, Andrew Gabriel wrote:
In article ,
ARW writes:
Just had a call from a neighbour with no HW or CH.
Potterton HE plus boiler.
Took me 30 seconds to decide to hit the pump in the airing cupboard with
a hammer.
Job done
My shower pump is currently in need of exactly that before each shower.
The little flow detection magnet in the hot pipe gets stuck in the no
flow position. This doesn't stop the pump coming on because the one in
the cold water side moves and triggers the reed switch, but the hot
side one blocks the hot flow until dislodged by a thump.
I took it to bits, but it's impossible to get to the bit where the
magnets are to clean it (solvent welded parts). Descalers and other
liquid cleaners had no effect.
Hopefully external switches can sort it.
I bought a couple of flow switches, and the idea was to cut the
little grill out which holds the existing ones captive, free them
into the waste bin, and use pipe ones instead.
As yet, haven't got around to doing it.
When I did this I ignored the built in ones, ignored the control stuff and just ran the motor & new switch & thermal wotsit in series. Simples.
Rapid do a flow switch that claims mains ratings. It's not mains suitable at all imho.
The problem in this case is the hot one actually blocks the hot flow
when it doesn't move - you get a cold power shower, even though the
pump kicks in.
--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]
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